Both the seller and purchaser of a group of assets that makes up a trade or business must use Form 8594 to report such a sale. Generally, both the purchaser and seller must file Form 8594 and attach it to their income tax returns (Forms 1040, 1041,.Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. CAUTION. The federal amounts that you use on your Arizona return may not be the same as the federal amounts from your federal tax return.